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From: Jan Stancek <jstancek@redhat.com>
To: ltp@lists.linux.it
Subject: [LTP] [PATCH] mlock_8-1, munlock_10-1: don't use LONG_MAX as invalid pointer
Date: Fri, 18 Oct 2019 09:39:41 -0400 (EDT)	[thread overview]
Message-ID: <1403291253.6979626.1571405981736.JavaMail.zimbra@redhat.com> (raw)
In-Reply-To: <20191018133733.GA31681@dell5510>


----- Original Message -----
> Hi Jan,
> 
> > arm64 kernel with commit 057d3389108e ("mm: untag user pointers passed to
> > memory syscalls") will assume this is tagged user pointer and will
> > attempt to clear first byte. This leads to test hitting different error
> > (EINVAL instead of ENOMEM).
> 
> > Add a helper function which provides invalid/unused pointer from user
> > address space.
> 
> > Signed-off-by: Jan Stancek <jstancek@redhat.com>
> Reviewed-by: Petr Vorel <pvorel@suse.cz>

Thanks, discussion in:
  http://lists.linux.it/pipermail/ltp/2019-October/013993.html
is still going, so maybe this will be fixed on kernel side
after all.


  reply	other threads:[~2019-10-18 13:39 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-14 12:42 [LTP] [PATCH] mlock_8-1, munlock_10-1: don't use LONG_MAX as invalid pointer Jan Stancek
2019-10-14 12:50 ` Cyril Hrubis
2019-10-18 13:37 ` Petr Vorel
2019-10-18 13:39   ` Jan Stancek [this message]
2019-10-18 13:46     ` Petr Vorel
2021-01-20  3:10 ` Li Wang
2021-01-20  9:32   ` Jan Stancek
2021-01-20  9:46     ` Li Wang

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